[mac] Fix issue 159361, frameless app windows could become draggable.

When an app defined no draggable regions, the ControlView non-draggable areas
wouldn't get resized when the window resized. This change makes them autosize
with the window.

BUG=159361
R=jianli@chromium.org,rsesek@chromium.org


Review URL: https://chromiumcodereview.appspot.com/12314115

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@184786 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed